REV. A
ADSP-2189M
–15–
TIMING PARAMETERS
GENERAL NOTES
Use the exact timing information given. Do not attempt to
derive parameters from the addition or subtraction of others.
While addition or subtraction would yield meaningful results for
an individual device, the values given in this data sheet reflect
statistical variations and worst cases. Consequently, you cannot
meaningfully add up parameters to derive longer times.
TIMING NOTES
Switching characteristics specify how the processor changes its
signals. You have no control over this timing—circuitry external
to the processor must be designed for compatibility with these
signal characteristics. Switching characteristics tell you what the
processor will do in a given circumstance. You can also use
switching characteristics to ensure that any timing requirement
of a device connected to the processor (such as memory) is
satisfied.
Timing requirements apply to signals that are controlled by
circuitry external to the processor, such as the data input for a
read operation. Timing requirements guarantee that the proces-
sor operates correctly with other devices.
MEMORY TIMING SPECIFICATIONS
The table below shows common memory device specifications
and the corresponding ADSP-2189M timing parameters, for
your convenience.
Memory
Timing
Device
Parameter
Specification
Parameter Definition
1
Address Setup to
tASW
A0–A13,
xMS Setup before
Write Start
WR Low
Address Setup to
tAW
A0–A13,
xMS Setup before
Write End
WR Deasserted
Address Hold Time
tWRA
A0–A13,
xMS Hold before
WR Low
Data Setup Time
tDW
Data Setup before
WR
High
Data Hold Time
tDH
Data Hold after
WR High
OE to Data Valid
tRDD
RD Low to Data Valid
Address Access Time tAA
A0–A13,
xMS to Data Valid
NOTE
1
xMS = PMS, DMS, BMS, CMS or IOMS.
ABSOLUTE MAXIMUM RATINGS
1
Value
Parameter
Min
Max
Internal Supply Voltage (VDDINT)
–0.3 V
+3.0 V
External Supply Voltage (VDDEXT)
–0.3 V
+4.6 V
Input Voltage
2
–0.5 V
+4.6 V
Output Voltage Swing
3
–0.5 V
VDDEXT + 0.5 V
Operating Temperature Range (Ambient)
–40
°C +85°C
Storage Temperature Range
–65
°C +150°C
Lead Temperature (5 sec) LQFP
+280
°C
NOTES
1Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only; functional operation of the
device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2Applies to Bidirectional pins (D0–D23, RFS0, RFS1, SCLK0, SCLK1, TFS0,
TFS1, A1–A13, PF0–PF7) and Input only pins (CLKIN,
RESET, BR, DR0,
DR1,
PWD).
3Applies to Output pins (
BG, PMS, DMS, BMS, IOMS, CMS, RD, WR, PWDACK,
A0, DT0, DT1, CLKOUT, FL2-0,
BGH).
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADSP-2189M features proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE